THM280 Hollow Rotary Actuator Rotating Platform Table With High Precision Planetary Gearbox
THM280 Hollow Rotary Actuator Rotating Platform Table With High Precision Planetary Gearbox
The THM280 Hollow Rotary Actuator Rotating Platform Table With High Precision Planetary Gearbox, also known as Hollow Rotary Platform or Hollow Rotary Table, is a high-precision mechanical component that provides rotary motion in a wide range of applications. It is designed with a hollow structure that allows cables, fluid lines, or other necessary components to pass through the axis, without affecting the actuator's rotation function.
With its high accuracy and precision, the THM280 Hollow Rotary Actuator Rotating Platform Table With High Precision Planetary Gearbox is widely used in various fields such as robotics, aerospace, medical equipment, military equipment, optical instruments, and industrial automation. It is expected to have a promising future market trend.

Basic Construction of Hollow Rotary Actuator
The Hollow Rotary Actuator consists of the following components:
- Crossed roller bearing
- Precision gears
- Input mounting flange
- Input shaft
- Induction device
Each component plays a vital role in the operation of the Hollow Rotary Actuator.

Crossed Roller Bearing
The crossed roller bearing provides support for radial, axial, and moment loads. It has a thick-walled outer ring that can withstand heavy loads and a thin-walled inner ring for high rigidity.
Precision Gears
The precision gears are used to transmit torque and motion from the input shaft to the output flange. They are designed to minimize backlash and ensure smooth, accurate motion.
Input Mounting Flange
The input mounting flange is used to attach the actuator to a structure or machine. It also provides a rigid connection for the input shaft.
Input Shaft
The input shaft is the part that connects the actuator to the motor or drive system. It transmits rotary motion and torque to the gears and output flange.
Induction Device
The induction device is used to sense the position and speed of the actuator. It provides feedback to the control system for accurate positioning and motion control.
Working Principle of Hollow Rotary Actuator
The working principle of the Hollow Rotary Actuator is as follows:
- Drive source: The actuator is usually powered by a motor, such as a servo motor, stepper motor, or DC motor. The motor converts electrical energy into mechanical energy and transmits it to the transmission system through the input shaft.
- Transmission mechanism: The transmission system usually contains a set of precision gears, such as a planetary gearbox. The motor's power is transmitted to the sun gear through the input shaft, driving a set of planetary gears that rotate around the sun gear. These planetary gears rotate and revolve around the internal ring gear, reducing the output speed and amplifying the torque. This design allows the hollow rotary actuator to provide high-torque output while maintaining a compact structure size.
- Hollow shaft design: The core feature of the actuator is the hollow rotating shaft inside, allowing cables, fluid lines, or other necessary components to pass through the axis without affecting the actuator's rotation function. This feature greatly enhances equipment integration in limited space.
- Position control and feedback: To achieve precise position control, the Hollow Rotary Actuator is equipped with position sensors, such as encoders or magnetostrictive displacement sensors. These sensing devices detect the actuator's rotation angle in real-time and transmit the data back to the control system, forming a closed-loop feedback mechanism to ensure that the actuator accurately moves according to the set target position.
- Load application: The output end of the actuator is connected to the load that needs to rotate through a flange or other interface, such as a robotic joint, radar antenna, medical equipment, etc., enabling it to perform accurate continuous or intermittent rotation operations.

In summary, the Hollow Rotary Actuator is a high-precision mechanical component with a hollow structure that allows cables, fluid lines, or other necessary components to pass through the axis. It is powered by a motor and uses precision gears to transmit motion and torque. Its hollow shaft design allows it to be easily integrated into equipment, while position sensors and feedback enable precise motion control. It is widely used in robotics, aerospace, medical equipment, military equipment, optical instruments, and industrial automation.
Design and Selection Considerations of Hollow Rotary Actuator
The design and selection considerations of the Hollow Rotary Actuator can be summarized in the following table:
| Consideration | Description |
|---|---|
| Load capacity | The maximum load that can be applied to the actuator output flange. |
| Torque output | The maximum torque that the actuator can provide at the output flange. |
| Speed range | The range of rotation speed that the actuator can provide. |
| Positioning accuracy | The degree of accuracy with which the actuator can position the load. |
| Environmental factors | The operating conditions and environmental factors that may affect the actuator's performance, such as temperature, humidity, and vibration. |
| Mounting options | The mounting options available for the actuator, such as flange mounting or base mounting. |
Applications of Hollow Rotary Actuator
The Hollow Rotary Actuator has a wide range of applications in various fields:
- Robotics: It is used in robotic arms and joints, enabling precise control and motion in various directions.
- Aerospace: It is used in satellite tracking systems, radar antennas, and other aerospace equipment, enabling precise motion control in a limited space.
- Medical equipment: It is used in medical imaging systems, radiation therapy machines, and other medical equipment, enabling accurate positioning and motion control.
- Military equipment: It is used in missile guidance systems, radar systems, and other military equipment, enabling precise motion control in harsh environments.
- Optical instruments: It is used in telescopes, cameras, and other optical instruments, enabling precise motion control and positioning.
- Industrial automation: It is used in automated manufacturing systems, enabling precise motion control and positioning in various applications.
In conclusion, our company is a modern enterprise that specializes in the research and development, design, manufacturing, sales, and services of professional servo electric cylinders, servo press equipment, and other servo stamping equipment. We have a professional design team, processing team, assembly team, sales team, and after-sales service team. Our company's main products are servo cylinders, servo presses, electric push rods, electric slide tables, and multi-degree-of-freedom platforms. We always adhere to the principles of "integrity, sincerity, stability, and compliance," with meticulous design, exquisite manufacturing, and sincere service.
Author: Miya
Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port




